    body,
html {
    height: 100%;
    margin: 0;
    font-size: 16px;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.8em;
    color: #666;
}

.pimg1,
.pimg2,
.pimg3,
.pimg4 {
    position: relative;
    opacity: 0.7;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.pimg1 {
    background-image: url('img/bg1.jpeg');
    min-height: 100%;
}

.pimg2 {
    background-image: url('img/bg2.jpeg');
    min-height: 400px;
}

.pimg3 {
    background-image: url('img/bg3.jpeg');
    min-height: 400px;
}

.pimg4 {
    background-image: url('img/bg4.jpeg');
    min-height: 100%;
}

.section {
    text-align: center;
    padding: 50px 80px;
}

.section-light {
    background: #f4f4f4;
    color: #666;
}

.section-dark {
    background: #282e34;
    color: #ddd;
}

.ptext {
    position: absolute;
    top: 50%;
    width: 100%;
    text-align: center;
    color: #000;
    font-size: 27px;
    letter-spacing: 8px;
    text-transform: uppercase;
}

.pimg1 .ptext .border,
.pimg4 .ptext .border {
    background-color: #111;
    color: #fff;
    padding: 20px;
}

@media(max-width: 500px) {
    .pimg1,
    .pimg2,
    .pimg3,
    .pimg4 {
        background-attachment: scroll;
    }